Why is it so hard to believe? You really think the military would drop bombs on cities and destroy infrastructure just to control the populace?
The nature of tyranny is about instilling fear in the populace in order to control them. If you destroy your own cities it defeats the purpose of being in power as a dictator.
The end goal is CONTROL, and you cannot control an armed populace. There aren't enough police and military to take on a city where a good portion of the people are armed. There are millions upon millions of armed civilians, and even the military wouldn't stand a chance. Not to mention that in history, taking guns away is exactly what dictatorships have done.